Why are we pretending anymore?

Blood trickled down from Leon's head and cascaded down while tainting the back of Rex hand that was still grabbing his face. However, even though Leon inflicted a huge blow from him, a tip of a dagger lightly poked Rex side. 

If Rex just heedlessly thrust forward, he was certain that he'll also receive a grave injury. After all, facing Leon needed precise calculations before attacking him as he was insanely flexible in terms of a bloody fight.

Thanks to the years of working with him, Rex grasped a few habits of Leon when fighting. Yet, Rex must admit that he lost. That until now, he never defeated Leon; not once. The only reason Rex successfully landed his attack to him was due to Leon's consent. 

For a split-second, Leon completely drop his guard as if giving him all the openings. Hence, with a great mind and keen eyes of Rex, he didn't wasted the once in a lifetime opportunity.